Equivalence Principle Algorithm for Potential Integral Equations

We present a new frequency-domain implementation of the equivalence principle algorithm (EPA) using the recently developed potential integral equations (PIEs) as inner formulations. The set of equivalent sources is updated by including all components of electric and magnetic fields, as well as potentials required for PIEs. The developed implementation is stable when applied to challenging problems involving extremely dense discretizations with respect to wavelength, while it is efficient at the same time thanks to the improved iterative solutions using EPA. The accuracy of the implementation is shown for the first time on canonical problems.